For softer, more delicate support, a soft-to-medium mattress is an excellent option. Since it has our softest support rating, it's the best choice if you want a comfortable and incredibly soft sleeping mattress. Find the new mattress of your dreams in a range of sizes, like single, double, king, and super king. Soft-medium mattresses can help to relieve pressure points and reduce back pain, as they provide a good level of support.